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Expect - bad command trap Posted by sgy258 (sgy258), 13 January 2004 I have an existing expect program that is used to spawn a telnet session and automatically login a user to a server. I would like to trap certain commands to prevent users from executing those commands (passwd, etc.). I modified my program according to Don Libes "Exploring Expect" Preventing - Bad Commands example on page 347. The command trap works, however when a user types a string, the string is echoed back on the next line - example: guest@gumby> pwd pwd /export/home Is there a way to prevent the string from echoing a new line with the command? Here is the section of code: set prompt ">" set badcmds "passwd|su" interact { -o -reset -nobuffer -re $prompt { while 1 { set timeout 1800 expect_user { -re "^badcmds.*" { send_user "Command not allowed...!\n" sleep 3 break } -re "(.*)\n" { send "$expect_out(1,string)\r" break } timeout { exit } } } This page is a thread posted to the opentalk forum
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